you must check if you have unity 2020.3.33f1. if not, install it.

i try this by muzzat plugin. thanks

you plugin files are not the latest version. com.apple.unityplugin.core-1.0.2.tgz com.apple.unityplugin.gamecenter-1.0.3.tgz these work fine. com.apple.unityplugin.core-1.0.3.tgz com.apple.unityplugin.gamecenter-1.0.4.tgz these don't work